Electric safety-lock



0. H. STOLBERG.

ELECTRIC SAFETY LOCK. APPLICATION HLED MAY 28, 1918.

INVENTOR OTTO H. STOLBERG BY Q4 ATTORNEY O. H. STOLBERG.

" ELECTRIC SAFETY LOCK,

APPLICATION FILED MAY 28, 1918.

Patented May 17, 19:21.-

2 SHEETS-SHEET 2.

m4 E m M Tm S WH m AYTORNEY avoid complication.

and .held until the ignitio UNITED STATES OTTO BL. STOLBERG, OF SAN FRANCISCO,

nnncrnrc SAFETY-LOCK.

, Specification of Letters Patent.

Application filed May 28, 1918. Serial No. 287,358.

To allwhom it may concern: Be it known that I, Orro citizen of the United States, residing in the city and county of vSan Francisco, State of California, have invented certain new and useful Improvements in Saftey-Locks, whereof the following is a specification.

This invention is an electric permutation lock. I have designed the invention more particularly for use with i ition of auto mobiles, though it is applicable for a variety of other uses, hence I will describe it as applied to controlling the ignition of an auto mobile.

In carrying out the invention for the purose mentioned, I provide a dial on which 1s the handle of the ignition switch, and a number of buttons or pushes, each of which controls two contacts. The combination and arrangement issuch that the ignition switch is locked in its oii position by an electricall controlled lock, whose circuit includes t e contacts of the several buttons. By a redetermined connection of the contacts, the locking. circuit is closed only when certain predetermined buttons are pushed handle. has been moved. The handle may on be swung to its on position and the ignition circuit closed. The movement of any one or more of the wrong buttons, or the omitted move- I-I. SroLBERo, a

ment of any of the right buttons, leaves the locking circuit open, and the ignition handle remains locked in its ofi position.

The construction and arrangement by which the above results are secured may be best understood by the illustration and de scription of an embodiment of the inven" tion which I have made.- This I will now give by the accompanying drawings and subjoined description thereof.

Figure 1 is a face view of the dial, broken away at one side for a purpose which will ap ear hereinafter.

ig. 2 is a crossssection, taken verticalli through Fi 1, but showing only two pus buttons, 0t er buttons being omitted to Fig. 3 is a view of the ignitionlocking mechanism, in its unlocked position.

Fig. 4 is the same in the locked position. Fig. 5 is an enlarged perspective view of a handle 11, and

two sheets of 1 means for preventing thewithdrawal of the mechanism caslng from the instrument board unless the ignition handle is in a particular position.

i Patented May 17, 1921. I

Fig. 6 is a perspective view ofthe mechanism casing. V

Fig. 7 1s a diagrammatic view to show the connections of the push buttons whereby they act as above set forth.

' In the figures :The box 1 is 'set into the instrument board 2 and fastened by any convenient means, as bythe screws 3. Into the box 1, is set a casing, shown in Fig. 6, which comprises the face plate oridial 4, the back plate 5, and intermediate plates 6, all connected together by the bolts 7 and one or more side bars 8 as shown particularly in Fig. 6. The casing also'comprises a rib or big 9,'wh1ch engagesa notch 10 in box 1 1g. 1), to insure the yproper register of the casing in the box. 7 p p v The dial 4 carriesthereon the ignition a number of push buttons 12, also the words on and ofif to indicate those positions of the handle .11. Each of the push buttons 12 has a spring 13, as

shown in Fig. 2, to return it to its outermost position after it has been pushed in and released, and to hold itthere. Each of the buttons 12 is provided, also, with two contact bars or rings, one, 14, on its inner end, which connects the switch ints 15, when the button is pushed in, an closes the circuit there, and one, 16 back from the end, which connects the swtch points 17, when the button is in its outermost position, and closes the circuit there. The parts 16 and 17 may serve also as stops to limit the outward movement of the buttons. v

The ignition circuit 18,-terminates in the switch points 19, as shown only in Fig.v 2, which are electrically connected by the arm 20 on the stub shaft21. The latter member is clutched at 22 to the shank 23 of handle 11. Thus the movement of handle 11 to its .on or ofi position, closes or'opens the ignition circuit.

The stub shaft 21 is'rotatably mounted in the back plate 24 of box 1, and carries a .cross bar 25. This bar engages a mutilated ring 26, which is secured to back plate 5, and prevents removal of said plate 5, and

other parts of the casing connected thereto, except when the stub and cross bar2'5 are hangs vertically, or about half way between its extreme position.v The casing is still further held to the box by a screw headed rod 27 as shown exclusively in Fig. 2, whose head'appears' onthe dial 4, and whose other end carries a bar 28 engaging a mutilated ring 29, similar to the ring 26.

Upon shank 23 of the ignition handle is a ring 30 having a notch 31 therein. This notch is engaged by a bolt 32 when handle 11 is in'its off position, and the handle is thereby locked in that position. In other positions of the handle, the bolt may ride on the circumference of the ring, and will not then interfere with its movement. The bolt is retracted'byan electromagnet 33', which is in circuit with the switch oints of. the buttons 12, as will bepresent y' described, When the magnet 33 is energized block 36. A lat as in the other figures.

' tons, having the contact bars 14 and 16 for;

are connected by the bar 6 when button 6' its armature 34 is attracted to it and moves the bolt which is connectedto the armature by the rods 35 assing through the guide 7 ch 37 prevents the retraction of the bolt until, the former has been withdrawn by magnet 38. A sur'ficient amount of play'may be allowed between the latch and the engaging member to permit the movement of the latch before theengaging member contacts it.

In the'diagrammatic view, Fig. 7, I show the electric connection of the ignition lock. The same reference numerals are applied 12 are the push butengaging respectively the switch points 15 and 17. 33 is the lock magnet and 39 a battery. The five buttons shown are marked a, b, c, d, e. Suppose, it is desired that the lock be released only when buttons 5, .rl, and e are pushed in, then the electric connections are made as follows. Points e is pushed in; one point e is connected to battery 39 by wire 54 and the other to one of the points d by the wire 40. The two points d are connected by bar d flbutton i d being pushed in. The points 15 from d to bare connected by the wires 41, 42 and 43. The two points 72 are connected'by the bar b, I), being pushed'in- The left hand point b is connected to points a and left hand points a by the wires 44,45 and 46. The two points a" are connected by the bar a and the other connections are made, as shown, by wires 47 to 53, and bar 16. Thus when the buttons 6, d and e are pushed in, and other buttons remain in their outermost position, the current will flow from battery 39 through wire 54, points and bar 6 and a, wire 40, d and d wires 41,

42, 43, points and bar I) and 5 wires 44, 45 and 46', points and bar a" anda)", wires 47, 48,49, points and bar-0 and wires 50, 51, 52, 53 and 56 to magnet 33, through the magnet coils, and wire 55 back to the battery. If any one or more of the active buttons, 5, d and e, be not pushedin, the circuit will be broken between bar 14 and points 15, and no current will pass. Similarly if any one or more of the idle buttons, a and 0, be pushed in the circuit will be broken between bar 16 and points 17 and no current will pass. Hence ignition handle 11 will be locked, except when all the active buttons are pushed in and all the idle buttons remain in their outermost position. The particular combinations required to unlo'ck handle 11, may be changed by shifting one or more of the connections 40 to 52, as will be readily understood by any electriclan.

The key-hole 58 may lock 57, independent 0 when sodesired. While I have used the term button and push, I have done so merely for brevity, as it is obvious that other forms of switch may be used, and the same is true of the ignition handle. Also the permutation switches, or buttons, and the device con- 've access to a'key .trolled may be widely separated, instead of in the same case, where it is convenient to do so, andnume'rous other structural changes may be made.

What I claim and desire to secure by Letters-Patent of the United States, is the following, to wit 1. 11 electric permutation lock comprising a source of current, an electromagnet and a lock operated thereby, and a number of buttons in series in the circuit and connections bridging one or more of. the buttons, whereby the circuit will be closed only by operating certain of the buttons and leaving the others untouched.

2. An electric permutation lock, comprising a switch and means for operating the same, a bolt adapted to lock saidswitch in a definite position, a magnet to operate said bolt, a number of push buttons in circuit in series with said magnet, and means for bridging one or more of said buttons, whereby the lock will be released only by oper ating certain predetermined buttons.

the electric lock,

ing a switch and means for operating the have hereto set my hand in the presence of same, means for locking said switch in a defitwo witnesses, this 23 day of May, 1918. nite position a magnet to operate said n means, push tinttons 1n circuit in series with. OTTO STOLBERW" said magnet and means for bridging one or Witnesses:

more of said buttons. N ICHOLAS KORNGOLD In testimony, that I claim the foregoing I FLORENCE L. WOLFE. 

